c# sort array

int[] arr = { 3, 6, 4, 1 };

// arr will be { 1, 3, 4, 6 }
Array.Sort(arr);

// arr will be { 6, 4, 3, 1 }
Array.Sort(arr);
Array.Reverse(arr); int[] sortedCopy = from element in copyArray 
                    orderby element ascending select element;Array.Sort(arr);